I like how this pretends to be scientific and yet mistakenly calls HIV "AIDS" routinely. Also, this...
"Insect-borne disease agents that have the ability to be transferred from one individual to the next via contaminated mouthparts must circulate at very high levels in the bloodstream of their host. Transfer by mouthpart contamination requires sufficient infectious particles to initiate a new infection. The exact number of infectious particles varies from one disease to the next."
Uhh, so tapeworms and heartworms have must pump a host's blood full of eggs or larvae to spread by flea and mosquito then. 🙄 A dog can often get tapeworm from a cat by eating a flea, which means that there must have been enough in the blood for that tiny little flea meal to contain it. It is a normal transmission vector. Mosquitos spread heartworm the same way. I highly doubt a host's blood is made of a significant portion of reproductive parts for either of these parasites, but it's obviously enough to spread anyway.